u-net simulation principle and flow 1.0

11 11www.huawei.com Huawei confidential, 2007-06

Huawei GENEX SeriesHuawei GENEX Series


GENEX Overview

GENEX U-Net Features

How to Use U-Net to Plan a Network

Contents


GENEXGENEX --- ---

Our Aim ------ Generate Excellent


RNCRNC

GENEX U-NetGENEX U-Net Radio Network Planning Radio Network Planning ToolTool

Downlink Downlink + + UplinkUplink

GENEX ProbeGENEX ProbeGENEX AssistantGENEX AssistantTest & Post-Process ToolsTest & Post-Process Tools

GENEX NastarGENEX NastarNetwork Performance Analysis Network Performance Analysis SystemSystem

GENEX U-Net is a radio planning tool that fully supports the technologies of GSM,GPRS-EDGE, CDMA IS95, WCDMA/UMTS/HSDPA, CDMA 2000/1xRTT/1xEVDO, and TD-SCDMA wireless networks.

The GENEX Probe, network optimization and drive test data collection system, is an air interface test tool for WCDMA/HSDPA/GSM/GPRS networks. GENEX Assistant is a professional wireless test data post-processing software system.

GENEX Nastar is a platform for monitoring and optimizing the performance of GSM/CDMA/WCDMA wireless networks

Huawei GENEX Family


GENEX Overview

GENEX U-Net Function


Contents


Pre-planning module

Network dimensioni

ng

U-Net Basic Module － required(including GSM network planning and prediction)

Measurements module

Test Mobile dataCW test dataPropagation

model tuning

AFP Module

Automatic

Frequency

Planning

DT Module

2G DT data for

coverage prediction

2G DT data for

propagation model tuning

MicroWave

Module

Microwave manageme

nt & analysis

3G module

Prediction and

simulation for WCDMA

& CDMA2000 /1xRTT /EV-

DO

Modules

Network Planning Coverage Calculation Interference Prediction


GENEX Overview

GENEX U-Net Features


Contents


Work Flow

Geographic data

Radio Network data

Resource data

U-net Prediction

Coverage Study Interference Study

Calibrate Propagation Model (optional)


Input Data

Geo data - digital map

Radio Network data

Resource data


Building project

Defining Coordinate System

Managing geographic data

Calibrate Propagation Model

File/New/project templates/GSM GPRS EGPRS

Tools/Options/Coordinates/Projection

File/Import/map/clutter/index/clutter classes

File/Import/map/height/index/altitudes

File/Import/map/vector/index/vector

Explorer/Modules/Propagation

Modules/(SPM)/Duplicate&Properties

Step by Step


Explorer/Data/Transmitters/Calculate

Explorer/Data/Transmitters/Neighbours

Explorer/Data/Transmitters/Interference Matrices

Explorer/Data/Transmitters/Frequency plan

Managing radio network data

Explorer/Data/Sites/New & Open table

Explorer/Data/Transmitters/(Properties/Station

templates) & New & Open table

Explorer/Data/Transmitters/Network settings&

Subcells

Explorer/Data/Antennas/New

File/Import/File of type:

Planet?database/Antennas/index

Planning and Prediction

Step by Step


Projection (Primary) Coordinate System:

It is a coordinate system of geographical database which depends on the imported geographic file. (Usually, projection system can be found in Projection file in DTM map directory).

Display Coordinate System:

it is a coordinate system for display and data-input. All the geographical coordinates are displayed and input according to this system. If the projection coordinate system and the display coordinate system do not match with each other, U-Net will adjust them.

U-Net works with the following two coordinate systems at the same time:

Selecting Coordinate System


Propagation Model

Model Frequency band Take into account Required settings Recommended use

Longley-Rice (theoretical) 300MHz-3000MHzTerrain profile

ReflectionCalibration

- Flat areas- Very low frequencies

ITU 370-7 Vienna 93100 MHz – 400

MHz- Terrain profile

Percentage time while real field > calculated field

- Long distances (d>10km)- Low frequencies

ITU 526-5 (theoretical) 30 - 10.000 MHz- Terrain profile

- Diffraction (3 knife-edge Deygout method)

Fixed receivers

WLL 30 - 10.000 MHz

- Terrain profile- Deterministic clutter

- Diffraction (3 knife-edge Deygout method)

- Free space loss- Receiver height and clearance per clutter

Fixed receivers> Microwave links

Okumura-Hata 150 - 1.000 MHz

- Terrain profile- Statistical clutter (at the

receiver)- 1 formula per clutter

- Reflection

- With diffraction or not- Urban loss + correction a(Hr

)

1 < d < 20 km> GSM 900

> CDMA/ CDMA2000

Cost-Hata 1.500 - 2.000 MHz

- Terrain profile- Statistical clutter (at the

receiver)- 1 formula per clutter

- Reflection

- With diffraction or not- Urban loss + correction a(Hr

)

1 < d < 20 km> GSM 1800

> UMTS

Standard Propagation Model

150 - 2.000 MHz- Terrain profile

- Statistical clutter- Effective antenna height

- With diffraction weight- K1, ..., K6 (single formula)

- LOS or NLOS differentiation- Loss per clutter with clutter

weighting- Receiver clearance

1 < d < 20 km> GSM 900> GSM 1800

> UMTS> CDMA/CDMA2000(Automatic calibration

available)


Standard Propagation Model (SPM ）

L=K1 + K2log(d) + K3log(HTxeff) + K4×Diffraction loss + K5log(d)×log(HTxeff) + K6(HRxeff) + Kclutter×f(clutter)

K1: Constant offset (dB)K2: Multiplying factor for log(d) d: Distance between the receiver and the transmitter (m)K3: Multiplying factor for log(HTxeff)HTxeff: Effective height of the transmitter antenna (m)K4: Multiplying factor for diffraction calculation. K4 has to be a positive numberDiffraction loss: Losses due to diffraction over an obstructed path (dB)K5: Multiplying factor for log(HTxeff)log(d)K6: Multiplying factor for HRxeffHRxeff: Mobile antenna height (m)Kclutter: Multiplying factor for f(clutter).f(clutter): Average of weighted losses due to clutter


Radio Network Data

Horizontal Pattern Vertical Pattern

Other Properties: Manufacturer, Gain (dBi), Beamwidth, Frequency

Antenna information


SitesA site is a geographical point where one or several transmitters (multi-sector site or station) equipped with antennas with particular characteristics are located.

Radio Network Data


TransmittersA transmitter is the source or generator of any signal on a transmission medium. A transmitter is a piece of equipment composed of some antennas located on a site.

Radio Network Data


Transmitter Equipment Parameters

U-Net provides two ways to calculate transmission/reception losses:• Use losses of TMA and feeder to calculate• Directly set in Transmitters table


Predictions without Simulation

Coverage by transmitter: Display the best server coverage

Coverage by signal level: Display the signal level across the studied area

Overlapping zones: Display the signal level across the studied area


Computation Zone

Usually, Computation Zone needs to be drawn before predictions.

Combine:

Delete:

Specially,• The computation zone may consist of several polygons. Draw a first polygon or select the existing zone on the map, then select the Combine tool of the Vector Edition bar and draw another polygon.• The computation zone may be holed. Draw a polygon or select the existing zone on the map, then select the Delete tool of the Vector Edition bar and delete the part you want to remove from the polygon.


Neighbours Automatic Allocation

•Intra-frequency

•Inter-frequency

•Inter-RAT

Display neighbors on map


Force co-site cells as neighbors: force co-site cells to be taken into account.

Force adjacent cells as neighbors: force adjacent cells to be neighbours.

Force symmetry: force neighbor symmetry.

Force exceptional pairs: force the constraints defined for exceptional pairs.

Reset neighbors: start the automatic allocation from scratch. Coverage conditions: eg. Signal Level, Ec/Io, coverage probability etc.

% min covered area: minimum percentage between the overlapping zone and the studied cell coverage area.

Neighbours Automatic Allocation

Max Number of Neighbors ： usually 32.


Point Analysis

Live Computation (without considering path loss matrix).

Path Profile

Diffraction Diffraction LossLoss

Diffraction peak (different Diffraction peak (different propagation modules have propagation modules have

different peaks). different peaks).

the angle of the LOS read in the antenna

vertical pattern

LOSLOS

Estimated Estimated shadow shadow marginsmargins

Distance Distance between between Tx-Rx Tx-Rx

Modules Modules used used

Signal Level at Signal Level at the receiver’s the receiver’s

endendStudied transmitters Studied transmitters

and repeatersand repeaters

10GHz 10GHz ellipseellipse

DTMDTM


Point Analysis

Radio reception diagnosis for a given point

Choose an existing Choose an existing simulation and check its simulation and check its

load conditions on UL load conditions on UL and DL. and DL.

Definition of user-Definition of user-definable “probe” definable “probe”

receiverreceiver

Analysis of specific Analysis of specific carrier or all carriers carrier or all carriers

(Carriers are (Carriers are considered as sets considered as sets in site equipment).in site equipment).

Availability of Availability of traffic on UL traffic on UL

and DLand DLCells in mobile Cells in mobile active set active set (grey area)(grey area)

Cells outside Cells outside active set active set

(white area)(white area)

Threshold for best server Threshold for best server that becomes part of active that becomes part of active set. (It varies with different set. (It varies with different

mobility types)mobility types)

Active set Active set threshold (best pilot threshold (best pilot quality - active set quality - active set

threshold)threshold)

Availability of Availability of PilotPilot

u-net simulation principle and flow 1.0

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